The embodiments herein related to a method in a network node, a network node, a method in a user equipment and a user equipment for handling base sequences in a communications network. The network node is configured to communicate with a first user equipment. The network node comprises information about a default base sequence and an alternative base sequence. The network node determines, for the first user equipment, that the alternative base sequence should replace the default base sequence. The network node sends information about the determined alternative base sequence to the first user equipment.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A user equipment for handling base sequences in a communications network, the user equipment being configured to communicate with a network node, the user equipment comprising: one or more processors configured to cause the user equipment to: receive, from the network node, information that an alternative UE-specific base sequence should replace a cell-specific default base sequence; wherein the information indicating the determined alternative user equipment specific base sequence is separate to information relating to Sequence and Group Hopping, and replace the default cell-specific sequence with the alternative UE-specific base sequence, and transmit a reference signal derived from the alternative UE-specific base sequence.
2. The user equipment of claim 1 , where the one or more processors are configured to cause the user equipment to: transmit a first reference signal derived from the default cell-specific base sequence; and transmit a second reference signal derived from the alternative UE-specific base sequence.
3. The user equipment of claim 1 , wherein the default cell-specific base sequence is a base sequence that is dependent on cell specific parameters of a cell which is serving the user equipment and wherein the alternative UE-specific base sequence is a base sequence that is not dependent on cell specific parameters of the cell which is serving the user equipment.
4. The user equipment of claim 1 , wherein the information about the alternative UE-specific base sequence is based on interference experienced by the user equipment or based on a probability of the user equipment experiencing interference.
5. The user equipment of claim 1 , wherein the information about the alternative UE-specific base sequence comprises receiving the alternative UE-specific base sequence in a radio resource control (RRC) configuration being signaled from the network node.
6. A method in a user equipment for handling base sequences in a communication network, the user equipment being configured to communicate with a network node, the method comprising: receiving, from the network node, information that an alternative UE-specific base sequence should replace a cell-specific default base sequence; wherein the information indicating the determined alternative user equipment specific base sequence is separate to information relating to Sequence and Group Hopping, and replacing the default cell-specific sequence with the alternative UE-specific base sequence, and transmitting a reference signal derived from the alternative UE-specific base sequence.
7. The method of claim 6 , comprising: transmitting a first reference signal derived from the default cell-specific base sequence; and transmitting a second reference signal derived from the alternative UE-specific base sequence.
8. The method of claim 6 , wherein the default cell-specific base sequence is a base sequence that is dependent on cell specific parameters of a cell which is serving the user equipment and wherein the alternative UE-specific base sequence is a base sequence that is not dependent on cell specific parameters of the cell which is serving the user equipment.
9. The method of claim 6 , wherein the information about the alternative UE-specific base sequence is based on interference experienced by the user equipment or based on a probability of the user equipment experiencing interference.
10. A network node for handling base sequences in a communications network, the network node being configured to communicate with a user equipment, the network node comprising one or more processors configured to cause the network node to: send information to the user equipment about a determined alternative UE-specific base sequence to replace a default cell-specific base sequence; wherein the information indicating the determined alternative user equipment specific base sequence is separate to information relating to Sequence and Group Hopping, and receive from the user equipment a reference signal derived from the alternative UE-specific base sequence.
11. The network node of claim 10 , wherein the default cell-specific base sequence is a base sequence that is dependent on cell specific parameters of a cell which is serving the user equipment and wherein the alternative UE-specific base sequence is a base sequence that is not dependent on cell specific parameters of the cell which is serving the user equipment.
12. The network node of claim 10 , wherein the information about the alternative UE-specific base sequence is based on interference experienced by the user equipment or based on a probability of the user equipment experiencing interference.
13. The network node of claim 10 , wherein the information about the determined alternative UE-specific base sequence to the user equipment comprises configuring the user equipment with the alternative UE-specific base sequence via radio resource control (RRC) signaling.
14. The network node of claim 10 , the network node comprising one or more processors configured to cause the network node to: receive a first reference signal from the user equipment which is derived from the default cell-specific base sequence; and receive a second reference signal from the user equipment which is derived from the alternative UE-specific base sequence.
15. A method in a network node for handling base sequences in a communications network, the network node being configured to communicate with a user equipment, the method comprising: sending information to the user equipment about a determined alternative UE-specific base sequence to replace a default cell-specific base sequence; wherein the information indicating the determined alternative user equipment specific base sequence is separate to information relating to Sequence and Group Hopping; and receiving a reference signal derived from the default cell-specific base sequence.
16. The method of claim 15 , wherein the default cell-specific base sequence is a base sequence that is dependent on cell specific parameters of a cell which is serving the user equipment and wherein the alternative UE-specific base sequence is a base sequence that is not dependent on cell specific parameters of the cell which is serving the user equipment.
17. The method of claim 15 , wherein the information about the alternative UE-specific base sequence is based on interference experienced by the user equipment or based on a probability of the user equipment experiencing interference.
18. The method of claim 15 , comprising: receiving a first reference signal from the user equipment which is derived from the default cell-specific base sequence; and receiving a second reference signal from the user equipment which is derived from the alternative UE-specific base sequence.
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March 26, 2019
December 1, 2020
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